Indicator for truing up work.



No. 837,677. PATENTED DEC. 4, 1906. B. P. ENNIS. INDICATOR FOR TRUING UPWORK.

APPLICATION FILED NOV. 20. 1905.

3 SHEETS-SHEET 1.

WITNESSES No. 837,677. PATENTED'DEQA, 1906.

B. .F. ENNIS. V

INDICATOR FOR TRUING vUP WORK. rrmoumn FILED NOV. 20.1905.

3 SHEETS-:BHBBT 2.-

W'ITNESSES Qsk INVENTUR.

' .AITTORNEY.

No. 837,677. PATENTED DEC. 4, 1906. B- F. ENNIS.

INDICATOR F OR TRUING UP WOR K. urmonmn rum) 17157.2(],1905.

3 SKBBTS-SHEBT 3.

11v VENTOR V fiTTORNEY.

UNITED STATES PATENT OFFICE.

BENJAMIN F. ENNIS, OF SYRACUSE, NEW YORK. ASSIGNOR OF ONE-HALF TO JOHNN. SGISM, OF SYRACUSE, NEWV YORK.

INDICATOR FOR TRUING UP WORK.

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed November 20, 1905. Serial No. 288,108.

To all whom it may concern.-

Be it known that I, BENJAMIN F. ENNIS, of Syracuse, in the county ofOnondaga, in the State of New York, have invented new and usefulImprovements in Indicators for Truing Up WVork, of which the following,taken in connection with the accompanying drawings, is a full, clear,and exact description.

This invention relates to the class of indicators which are designed fordetermining any degree of inaccuracy of work on a lathe or other machineon which it is mounted to be operated on.

The object of the invention is to provide an indicator which shall beadapted to be used in various positions and applicable to lathes,planers, milling-machines, drillpresses, and analogous machines andshall be very sensitive and eflicient in detecting and indicating anydefect in either the shape or position of the work in relation to themachine on which it is mounted; and to that end the invention consistsin the novel construction of the indicator hereinafter described andclaimed.

In the accompanyin drawings, Figures 1 and 2 are side and plan views,respectively, of an indicator embodying my invention as used forascertaining if a piece of work is perfectly round on its exterior orperfectly centered in a lathe. Fig. 3 is a transverse section on theline 3 3 in Fig. 1, showing in dotted lines the action of the indicatorwhen ap plied to a cylindrical piece of work which is not perfectlycentered in the lathe or defective in its circular exterior. Fig. 4 is aside view of the indicator as used for axially cen tering on a lathe ahollow cylindrical body or an annular socket or cavity in an articlemounted on the lathe. Fig. 5 is a transverse section on the line 5 5 inFig. 4 viewed in the direction of the arrow. Fig. 6 shows the means forholding the indicator in operative position on a lathe viewed from theline 6 6 in Fig. 1. Fig. 7 is a face view of a modification of theconstruction of the indicator. Fig. 8 is an enlarged sectional view onthe line 8 8 in Fig. 4. Fig. 9 shows the indicator adapted to be set atany required height on the table of a planer or other machine todetermine the height of the surface of the work operated on. Fig. 10shows the indicator held in a surface-block testing the depth of asocket or cavity drilled in a piece of work.

Fig. 11 is a face view of said indicator, showing by dotted lines itsaction in case the aforesaid socket or cavity is not of the requireddepth. Fig. 12 shows the indicator used in connection with asurface-gage for accurately setting the work on a machine bed or table,and Fig. 13 is a side view of a further modification of the means fortransmitting motion to the indicator.

Similar letters of reference indicate corresponding parts.

0, denotes the supporting-arm of the indicator, which arm is preferablyof the form of a steel bar which is bent at a right angle, as shown at ain Fig. 1, to allow the indicator to be supported in proper operativeposition on a lathe, in which case a suitable tool-hold er A is securedto a tool-post mounted on the lathe in the usual manner. (Not shown inthe accompanying drawings.) In the said tool-holder is clamped a stud b,which is provided with a transverse aperture, into which is inserted oneof the end portions of the supporting arm or bar a. In the outer end ofthe stud b is a screw-threaded axial channel containing a thumb-screw c,by means of which the arm a is adjustably clamped in the stud b. Theopposite end of the arm a is inserted in a sleeve d, which is movablelongtiudinally and at the same time embraces said arm su'llicientlytight to support the arm in its desired position. The free end of thesleeve (1 is-formed with a head 6, consisting of two flexible plates e6, extending slightly divergent from the sleeve (1 and terminating inbearings ff, in which are pivoted two rollers g g.

The base of the head e is provided with an orifice 7t, receiving throughit a stem 2', which passes between the rollers g g, as shown moreclearly in Fig. 8 of the drawings. The portion of the stem t which iswithin the head 0 is tightly embraced by a sleeve y', the upper end ofwhich enga es shoulders Z on the peripheries of the rollers g g, whichare forced toward the stem i by means of a suitable spring I", pressingthe plates 6 6 toward each other. Said spring is preferably formed froma wire bent V-shaped and passing across the bottom of the head e andterminated in inward bends 7c, which are inserted into sockets p in therollers g g.

To each of the rollers is fastened a pointer n, which has its free endnormally contiguous the free end of said pointer and in position to betraversed by the free end of the other pointer.

The operation of the described indicator when used on a lathe andsupported by means of a suitable tool-holder A is as'follows: Assumingthat the iece of work mounted on the head or chucli of the lathe is ofcylindrical form or has a circular or cylindrical projection in regardto which the work is to be centered on the lathe, as shown in Figs. 1and 3 of the drawings, the indicator is to placed in position to allowthe free end of the stem i to bear on the periphery of the cylindricalor circular part P of the work. The attendant of the lathe pushes thestem t into contact with the part P while holding the pointerscontiguously side by sidewhen the stem 01 is in its normal position-i.e., in its bearing on the lowest portion of the surface of the work P,traversed by the stem i. The attendant of the lathe then releases hishold on the pointers 'n, n and turns the work P chucked to the lathe. Incase the said work is not properly centered in the lathe the stem ireceives an upward thrust by its contact with the eccentrically-placedwork. The sleeve 7', having a frictional hold on the stem, is caused tomove with it and by its engagement with the shoulders Z Z on the rollersg g said rollers are turned and caused to swing the pointers n n fromeach other, and thus indicate the degree of eccentricity of the work P,as shown in dotted lines in Fig. 3 of the drawings.

The described indicator operates in the same manner in centering ortruing the interior of a cylindrical or circular hollow part P of workmounted in the lathe, as represented in Figs. 4 and 5 of the drawings,in which case I pivot to the arm or bar a an elongatedfinger p, the freeend of which is placed upon the inner surface of the work P and the stem71 set upon the said finger in proximity to the work P and is thuscaused to vibrate in case said work is not in center in the lathe.

The described indicator may also be used in connection with a flexiblerod 1, placed at one end'central on the dead spindle s of the lathe andat its opposite end in the center of the work P clutched on the head Hof the lathe, as shown 1n Fig. 13 of the drawings. In this applicationof the indicator it is placed in position to allow the stem i to be seton the rod 1", which receives a vibratory motion in case the work P isnot perfectly centered on the lathe. The vibratlon of said rod actuatesthe stem i, and thereby causes the pointers of the indicator to move andshow the degree of eccentricity of the work P The rod 1" is renderedflexible by notches 1", cut alternately in opposite sides of the rod. Aspringwire r is inserted in a central longitudinal bore in the notchedportion of the rod to maintain said rod normally straight.

The described indicator is also very useful and very convenient andreliable in determining the depth of a socket or recess 15 in a plate 0,as illustrated in Figs. 10 and 11 of the drawings. For this urpose theindicator is to be attached to a lock D, which securely retains theindicator in its erect position. The indicator is to be first adjustedby plac ing on the bed F of the drill-press or other uniform surface agage I, of precisely the same depth as the socket t'to be drilled, and

placing on the top of said gage the block D, Y

with the indicator attached thereto. Then the operator pushes down thestem 01 to cause it to bear on the bed F, as shown in Fig. 9 of thedrawings, the pointers n 'nbeing in the meantime held by the operator toprevent their movement from normal posi' tioni. 6., contiguously side byside. Then the block D, with the indicator, is removed from the gage Iand ready to be placed on the work or plate C and in position to allowthe stem '6 to be inserted into the socket t, drilled in said plate, asshown in Figs. 10 and 11 of the drawings. In case the said socket hasnot been drilled to the required depth the contact of the stem 7 withthe bottom of said socket pushes up the said stem and causes thepointers 'n n to swing from each other, as represented by dotted linesin Fig. 11 of the drawings, and thus indicate the deficiency in thedepth of the socket t.

A still further use of my improved indicator is illustrated in Fig. 12of the drawings, in which it serves to enable the attendant of themachine to accurately set a block or work C on the bed or table of themachine which is to operate on said block. In this case the indicator isdisposed over the top of the block C and supported by the bar or arm a,which is suitably connected to a collar u, embracing a verticalcylindrical post 1), which rises from a base L, mounted on the bed F.The arm a is movable longitudinally on the collar a, which is adapted toturn on the post 0 and thus allows the indicator to be placed overdifferent parts of the plate C. The stem 'i being held in contact withthe surface of the plate C during the shifting of the indicator in itsposition on the said plate causes the stem i to be forced upward by anyraised portion of the surface of the plate traversed by the stem. Saidmovement of the stem causes the pointers n n to be vibrated and indicatevery distinctly said unevenness of the traversed surface.

In the modification shown in Fig. 7 of the drawings the rollers g g,hereinbefore described, are dispensedwith, and instead thereof theindicating-pointers n n are pivoted to a vertic ally-movable pin a,which is interposed transversely between the pointers at a shortdistance from the lower ends thereof. The spring-arms e e of the head 6engage at their upper ends with notches o v in the sides of the pointersabove the pivot-pin'u and press said pointers to each other, as shown infull lines in said figure. In the said action the pivot-pin u isdepressed to its normal position. The stem i bears on the bottom of thepivot-pin, and in case said stem receives an upward thrust the pivot-pinis pushed up, and is thereby caused to swing the indicatingpointers n nfrom each other, as represented in dotted lines.

It will be observed. that my described indicator possesses severalmeritorious advan tages, among which the following are very important,viz: First, it is adapted to be used in various positions and forvarious purposes desired by machinists working on lathes, planers,milling machines, drillpresses, and other machines; secondly, it is veryconvenient in its application for the said purposes; thirdly, it is verysensitive and reliable in its actions, owing to the length of theindicating-pointers, causing a greatlyaugmented indicating movementthereof, and, fourthly, it is readily adjusted for various purposes.

What I claim as my invention is 1. An indicator for truing up work andanalogous purposes comprising a sup ortingarm, a head carried on saidarm, rol ers pivoted to said head, indicating-pointers attached to therollers, and a longitudinallymovable stem guided in said head to bear onthe work and transmit motion to the rollers.

12. An indicator, for truing up work, and analogous purposes, comprisinga supportingarm, a head carried on said arm and formed with flexibleside plates, indicatingpointers pivotally supported between said sideplates, and a longitudinally-movable stem actuated by the work andtransmitting motion to the indicating-pointers.

3. An indicator for truing up work and analogous purposes, comprising asupporting arm, a head carried on said arm and formed with flexible sideplates, rollers pivoted to said side lates, indicating-pointers attachedto the ro lers, and a longitudinally-movable stem actuated by the workand transmitting motion to the indicating-pointers.

4. An indicator for truing up work and analogous purposes, comprising asupportingarm, a sleeve embracing said arm, and adjustablelongitudinally thereon, a head projecting from said sleeve and formedwith flexible side plates, rollers pivoted to said side plates,indicating-pointers attached to said rollers, a spring disposed to pressthe side plates toward each other, and alongitudinally-movable stemtransmitting motion from the work to the rollers.

5. An indicator, for truing up work and analogous purposes, comprising asupportingarm, a head carried on said arm and formed with flexible sideplates, rollers pivoted to said side plates and provided on theiradjacent sides with shoulders, indicatingointers attached to therollers, a longitudinal y-movable stem passing between the rollers andadapted to bear on the work, and a sleeve embracing the stem andengaging the shoulders of the rollers as set forth.

6. An indicator, for truing up work and analogous purposes, comprising asupport, a head projecting from said support, indicatingpointerspivotally supported on said head, a longitudinally-movable stemtransmitting motion to the indicating-pointers, and a laterally-yieldingbar engaging the work and actuating the aforesaid stem.

7. An indicator for truing up cylindrical work, comprising asupporting-arm, a head projecting from said arm, indicating-pointerspivotally supported on said'head, a finger pivoted at one end to thesupporting-arm and adapted to bear with its 0 posite end on the interiorof the cylindrical work, and a stem bearing on said finger andtransmitting motion to the indicating-pointers.

8. A bar supported at one end in the center of the lathe and bearingwith the opposite end on the work, and provided with transverse notchesin opposite sides to impart flexibility to said bar, in combination witha lon 'itudinally-movable stem actuated by said bar, andindicating-pointers actuated by the stem.

9. Abar supported at one end in the center of the lathe and bearing withthe opposite end on the work and having transverse notches in oppositesides to impart flexibility to said bar, and means for sustaining saidbar in its normal position in combination with a longitudinally-movablestem riding endwise on said bar, and indicating-pointers actuated bysaid stem.

BENJAMIN F. ENNIS. Witnesses:

J. J. LAASS, L. H. FULMER.

